<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
    <meta name="description" content="Use the camera to control the view, and create custom event handlers for input.">
    <meta name="cesium-sandcastle-labels" content="Tutorials, Showcases">
    <title>Cesium Demo</title>
    <script type="text/javascript" src="../Sandcastle-header.js"></script>
    <script type="text/javascript" src="../../../Build/CesiumUnminified/Cesium.js" nomodule></script>
    <script type="module" src="../load-cesium-es6.js"></script>
</head>
<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html">
<style>
    @import url(../templates/bucket.css);
</style>
<div id="cesiumContainer" class="fullSize"></div>
<div id="loadingOverlay"><h1>Loading...</h1></div>
<div id="toolbar">
    <table class="infoPanel">
        <tbody>
        <tr>
            <td>Click on the Cesium display to start.</td>
        </tr>
        <tr>
            <td>w/s - move forward/backward</td>
        </tr>
        <tr>
            <td>a/d - move left/right</td>
        </tr>
        <tr>
            <td>q/e - move up/down</td>
        </tr>
        <tr>
            <td>left mouse button down plus mouse move changes the look direction</td>
        </tr>
        </tbody>
    </table>
</div>
<script id="cesium_sandcastle_script">
function startup(Cesium) {
    'use strict';
//Sandcastle_Begin
var viewer = new Cesium.Viewer('cesiumContainer');

var scene = viewer.scene;
var canvas = viewer.canvas;
canvas.setAttribute('tabindex', '0'); // needed to put focus on the canvas
canvas.onclick = function() {
    canvas.focus();
};
var ellipsoid = scene.globe.ellipsoid;

// disable the default event handlers
scene.screenSpaceCameraController.enableRotate = false;
scene.screenSpaceCameraController.enableTranslate = false;
scene.screenSpaceCameraController.enableZoom = false;
scene.screenSpaceCameraController.enableTilt = false;
scene.screenSpaceCameraController.enableLook = false;

var startMousePosition;
var mousePosition;
var flags = {
    looking : false,
    moveForward : false,
    moveBackward : false,
    moveUp : false,
    moveDown : false,
    moveLeft : false,
    moveRight : false
};

var handler = new Cesium.ScreenSpaceEventHandler(canvas);

handler.setInputAction(function(movement) {
    flags.looking = true;
    mousePosition = startMousePosition = Cesium.Cartesian3.clone(movement.position);
}, Cesium.ScreenSpaceEventType.LEFT_DOWN);

handler.setInputAction(function(movement) {
    mousePosition = movement.endPosition;
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);

handler.setInputAction(function(position) {
    flags.looking = false;
}, Cesium.ScreenSpaceEventType.LEFT_UP);

function getFlagForKeyCode(keyCode) {
    switch (keyCode) {
    case 'W'.charCodeAt(0):
        return 'moveForward';
    case 'S'.charCodeAt(0):
        return 'moveBackward';
    case 'Q'.charCodeAt(0):
        return 'moveUp';
    case 'E'.charCodeAt(0):
        return 'moveDown';
    case 'D'.charCodeAt(0):
        return 'moveRight';
    case 'A'.charCodeAt(0):
        return 'moveLeft';
    default:
        return undefined;
    }
}

document.addEventListener('keydown', function(e) {
    var flagName = getFlagForKeyCode(e.keyCode);
    if (typeof flagName !== 'undefined') {
        flags[flagName] = true;
    }
}, false);

document.addEventListener('keyup', function(e) {
    var flagName = getFlagForKeyCode(e.keyCode);
    if (typeof flagName !== 'undefined') {
        flags[flagName] = false;
    }
}, false);

viewer.clock.onTick.addEventListener(function(clock) {
    var camera = viewer.camera;

    if (flags.looking) {
        var width = canvas.clientWidth;
        var height = canvas.clientHeight;

        // Coordinate (0.0, 0.0) will be where the mouse was clicked.
        var x = (mousePosition.x - startMousePosition.x) / width;
        var y = -(mousePosition.y - startMousePosition.y) / height;

        var lookFactor = 0.05;
        camera.lookRight(x * lookFactor);
        camera.lookUp(y * lookFactor);
    }

    // Change movement speed based on the distance of the camera to the surface of the ellipsoid.
    var cameraHeight = ellipsoid.cartesianToCartographic(camera.position).height;
    var moveRate = cameraHeight / 100.0;

    if (flags.moveForward) {
        camera.moveForward(moveRate);
    }
    if (flags.moveBackward) {
        camera.moveBackward(moveRate);
    }
    if (flags.moveUp) {
        camera.moveUp(moveRate);
    }
    if (flags.moveDown) {
        camera.moveDown(moveRate);
    }
    if (flags.moveLeft) {
        camera.moveLeft(moveRate);
    }
    if (flags.moveRight) {
        camera.moveRight(moveRate);
    }
});
//Sandcastle_End
    Sandcastle.finishedLoading();
}
if (typeof Cesium !== 'undefined') {
    window.startupCalled = true;
    startup(Cesium);
}
</script>
</body>
</html>
